cornelius



y 1955 R. T. CORNELIUS WABBLE PUMP Original Filed May '7, 1955 2Sheets-Sheet l INVENTOR.

s W L E N R O C T D R A H m Rv ATTORNEYS y 3, 1955 R. T. CORNELIUS Re.23,992

WABBLE PUMP 2 Sheets-Sheet 2 Original Filed May 7, 1953 INVENTOR RICHARDT CORNELIUS AT TORN YS United States Patent WABBLE PUMP Richard T.Cornelius, Minneapolis, Minn.

Original No. 2,693,764, dated November 9, 1954, Serial No. 353,583, May7, 1953. Application for reissue January 4, 1955, Serial No. 479,877

14 Claims. (Cl. 103-133 Matter enclosed in heavy brackets [:1 appears int he original patent but forms no part of this reissue specification;matter printed in italics indicates the additions made by reissue.

The herein disclosed invention relates to wabble pumps and has for anobject to provide a construction in which the rotating parts areeffectively sealed from the wabbler and pumping parts so as to preventthe entry of lubricant from the rotating parts to the chambers throughwhich the fluid being pumped passes.

Another object of the invention resides in provldlng a construction inwhich the wabbler virtually floats with reference to the parts of thepump housing with which it is associated whereby a minimum resistance tothe pumping action occurs and whereby greater efficiency results.

A further object of the invention resides in providing a flexible sealbetween the wabbler and the pump housing and in locating said seal in amanner such that a minimum amount of flexing of the seal occurs as thepump operates.

A still further object of the invention resides in providing the pumphousing with an annular pump chamber formed with an outer sphericalsurface and the wabbler with a wabble plate movable in said chamberabout the center of said spherical surface and in further disposing theflexible seal between the wabbler and the housing in a manner such thatthe medial plane of said chamber containing the center of said sphericalsurface extends through said seal.

. Another object of the invention resides in constructing the wabblerwith a head from which said wabble plate issues and in constructing saidhead with a pocket for the reception of said seal.

Other objects of the invention reside in the novel combination andarrangement of parts and in the details of construction hereinafterillustrated and/or described.

In the drawings:

Fig. 1 is a longitudinal elevational sectional view taken on line 1--1of Fig. 2.

Fig. 2 is a transverse elevational sectional view taken on line 22 ofFig. l.

Fig. 3 is a view similar to Fig. 1 of a modification of the inventionand taken on line 3-3 of Fig. 4.

Fig. 4 is a view similar to Fig. 2 of the construction shown in Fig. 3and taken on line 44 of Fig. 3.

The construction shown in the drawings consists of a housing supportinga drive shaft for rotation. This shaft carries a rotor having bearingstherein and supporting a wabble shaft for rotation relative to saidrotor. The wabble shaft has mounted on it a wabble head and from which awabble plate issues. This wabble plate is movable in an annular chamberhaving two facing frustoconical surfaces and an outer end surfacespherical in form. The medial plane of the wabble plate passes throughthe center of said spherical surface and likewise the medial'plane ofthe chamber. The portion of the housing forming the annular chamber isconstructed with an inner spherical surface concentric with said outerspherical surface and which intersects a slot in said chamber throughwhich the wabble plate extends. A flexible tit Re. 23,992 Reissued May3,1955

"ice

and to a sleeve secured to the pump housing separates the rotating partsfrom the wabbler and thus prevents the passage of lubricant from therotating parts to the fluid being pumped. This flexible seal is situatedso that the medial plane of both the wabble plate and the pump chamberpass through the same. In one form of the invention the seal consists ofa rubber disc secured to a sleeve mounted on the wabble shaft and to asleeve secured to the housing. In the other form of the invention, theseal consists of a metallic bellows serving the same purpose andsimilarly mounted. The wabble-head is of seal attached to a partrotatable with the .wabble plate appreciable dimensions and isconstructed with a flange and a tubular portion which has a sphericalsurface coacting with the inner spherical surface of the housing andclosing the opening to the pump chamber. By means of'this construction,a pocket is formed within the wabble head in which the seal is disposed.Suitable valve mechanisms formed within the pump and with the usualinlet and outlet passageways is also provided.

The invention consists of a housing 10 which is substantiallycylindrical in form and which is constructed open at one end and with abore 11 extending partly throughout the length of the same andcommunicating with the open end of the housing. Adjacent the bore 11 thesaid housing is formed with a second bore 12 of lesser diameter andproviding between said bores a face 13. Disposed outwardly of thehousing 10 is a tubular portion 14 which is constructed with a bore 15smaller in diameter than the bore 12. The bores 11, 12 and 15 are allconcentric. The housing 10 is provided with a base 16 by means of whichthe same may be attached to the surface on which the pump is to bemounted.

At the ends of the bore 15 of portion 14 of housing 10 are two ballbearings 17 and 18. The outer races 24 and 26 of these bearings arepressed into the bore 15 and are held in spaced relation by means of asleeve 19 received within the'bore 15 and engaging said races. A shaft21 extending through the sleeve 19 is received in the inner races 23 and25 of the bearings 18 and 17 and rotatably supported thereby. This shafthas a rotor 22 on one end of the same and whichis freely received withinthe bore 12 of the housing. This rotor bears against the inner race 23of the bearing 18. The other end of the shaft 21 has a shaft extension27 which extends outwardly beyond the tubular portion 14 of housing 10and through which power may be applied to the said shaft to drive thepump. A nut 28 screwed on threads 29 formed on this shaft extensionengages a lock washer 31 disposed between said nut and the inner face 25of the bearings 17. By means of this construction the two bearings areurged toward each other and the outer races 24 and 26 thereof held inengagement with the sleeve 19. Set screws 32 screwed into the portion 14of housing 10 hold the sleeve 19 from movement and correspondingly thebearings 17 and 18 in position.

The rotor 22 has a bore 33 therein which is angularly disposed withreference to the axis of the shaft 21. This bore receives the outerraces 34 and 35 of two ball bearlugs 36 and 37. The inner races 38 and39 of these bearmgs support a shaft 41 which will be referred to as thewabble shaft. The shaft 41 has a head at one end of the same whichengages the inner race 38 of bearing 36 A sleeve 42 mounted on shaft 41engages the outer end of the race 39 of bearing 37 and is urged againstsuch bearing in a manner to be presently described to hold the shaftrigidly mounted in said bearings. The outer race 34 of the bearing 36engages a washer 43 at the end of the bore 33. A similar washer 44 isdisposed adjacent the outer race 35 of bearing 36 and is engaged by aretaining ring 45 screwed into the rotor 22. By means of thisconstruction the shaft 42 and the bearings 36 and 37 are held fromendwise movement relative to the rotor 22. However, the shaft 41is freeto rotate relative to said rotor.

Lubrication of the parts is procured by means of a lubricant placedwithin the interior of sleeve 19 and within the bore 12 of housing 10.Such lubrication readily reaches the various bearings 17, 18, 36 and 37.

Within the bore 11 of housing 10 is a case 46 consisting of two inserts47 and 48. The insert 47 fits against the face 13 of the housing 10'while the insert 48 butts up against the insert 47. The case 46 is heldfrom rotation within the housing 10 by means of a dowel pin 94 extendingbetween said case and housing. A cap 49 also received within the bore 11is urged into engagement with the insert 48 by means of a retaining ring51 screwed into the end of the housing 10. A fluid-tight connectionbetween the said cap and housing is procured through a gasket 52interposed between said cap and the housing. The insert 47 isconstructed with a frusto-conical surface 53, the apex of which liesalong the axis of the shaft 21. The insert 48 similarly has afrusto-conical surface 56, the apex of which likewise lies along theaxis of the shaft 21. The surfaces 53 and 56 are disposed in spaceddiverging relation and are connected at their bases by means of aspherical surface 57 which has its center 54 disposed along the axis ofthe shaft 21 at a locality midway between the apexes of the two surfaces53 and 56. The case 46 further has a spherical surface '58 whose centersimilarly coincides with the center 54. The axis of the shaft 21 alsocontains the center 54. This center will hereafter be referred to as thewabble center of the pump.

Mounted on the wabble shaft 41 is a wabble head 59 which is constructedwith a hub 61 disposed on said shaft. The said hub engages the sleeve 42and is keyed thereto by means of a pin 62. A washer 63 encircles the endof the shaft 41 and bears against the hub 61. A nut 64 screwed onthreads 65 formed on the end of the shaft 41 urges the washer 63againsthub 61 and cooperating with the head 42 on shaft 41 clamps theraces 38 and 39 of bearings 36 and 37, the sleeve 42 and the hub 61securely in position upon said shaft. The hub 61 is held from rotationby means of a key 66 entering both said shaft and hub. Issuing outwardlyfrom the hub 61 is a web 67 which has connected to the outer end of thesame a tubular member 68. This tubular member has a spherical surface 69conforming to the surface 58 of the case 46 and whose center coincideswith the center 54. The said web and tubular member provide a pocket 71within the wabble head 59 and which serves a purpose to be presentlydescribed in detail. from the tubular member 68 is an annular disc likeplate 72 which will be referred to as the wabble plate. This plate hastwo surfaces 73 and 74 which are at right angles to the axisof the shaft41 and whichare equally spaced from the wabble center 54. The surface 73is adapted to lie in close proximity to the surface 53 of case 46 whilethe surface 74 is adapted to lie in close proximity to the surface 56 ofsaid case. In addition, the end 70 of plate 72 conforms to and lies inclose proximity to the spherical surface 57 of case 46. In the drawingsthe various surfaces of the wabble head 59 have been shown in anexaggerated manner as spaced from the corresponding surfaces of the case46. The pump will however be constructed with small clearances, and whenso con structed functions in an extremely eflicient manner to pumpliquids such as water and the like which afford a seal between theparts. If, however, it becomes desirable, the surfaces can beconstructed as contacting with the result that higher pressures can beprocured at the expense of greater friction between the parts.

While the surfaces 53 and 56 have been shown as frustoconical and thesurfaces 73 as plane, it will be readily comprehended that the surfaces53 and 56 may be generated by various lines rotated about the axis ofthe drive shaft and the surfaces 73 by lines lying in proximity Issuingoutwardly to elements of surfaces 53 and 54 and rotatedabout the axis ofthe wabble shaft.

At the upper end of the case 46, the same is provided with a partition75 which is received in slots 76 in the inserts 47 and 48. Thispartition extends through a notch 77 in the wabble plate 72 and down tothe spherical sur face 69 of the tubular member 68 of the wabble head59. The inner end 78 of this partition has a surface cor responding withthe surface 58 of case 46 and which surface is held spaced from thesurface 69 of the wabble head 59 by means of shoulders 79 formed on thesaid partition and engaging corresponding shoulders on the inserts 47and 48. Overlying the housing 10 at the locality of the partition 75 isa tubular portion 81 which is brazed or welded to said housing. Thisportion has a partition 82 in the same which overlies and engagesthepartition 75 and which divides the interior of said portion into twochambers 83 and 84. One of these chambers serves as an outlet chamberand the other [hjlas an inlet chamber. Threads 85 and 86 in said portionof the housing permit of connection of suitable pipes or tubes to thepump.

Disposed between the shaft 41 and the housing 10 is a flexible annularseal 87. This annular seal is in the form of a relatively heavy disc ofrubber or other similar material and has its inner edge integrallyconnected to the sleeve 42 and its outer edge integrally connected to asleeve 88 formed on a flange 89. Seal 87 is so situated that the centerof the medial plane thereof lies substantially at the wabble center 54.Flange 89 is received in an annular recess 91 formed in the face 13 ofthe housing 10. A dowel pin 92 holds the flange 89 from rotation. Theinsert 48 is held from rotation relative to the insert 47 by means ofthe partitions 75. A gasket 93 disposed between the housing 10 and theflange 89 prevents leakage between the seal 87 and the housing.

The form of the invention shown in Figs. 3 and 4 is similar to thatshown in Figs. 1 and 2 and the description of the similar parts will notbe repeated but will be referred to by the same reference characterspreceded by the digit 1.

In the construction shown in Figs. 3 and 4 the sleeve 142 is constructedwith an end bell 95 to which one end of a flexible metal bellows 94 isattached. In this form of the invention, the flexible member 87 isdispensed with and the bellows 96 takes its place. The flange 189 isconstructed without the sleeve 88 and the other end of the bellows 96secured thereto. The remainder of the pump is the same as thatpreviously described and its operation is identical excepting that thebellows 96 flexes as the plate 72 wabbles instead of the seal 87.

The method of the operation ofthe invention is obvious. As the shaft 21rotates rotor 22 rotates and shaft 41 nutates with it. The bearings 36and 37 being angularly disposed cause the shaft 41 to wabble and theplate 72 to follow along the surfaces 53 and 56 of the insert 47. Thiscauses the fluid to be drawn in through one of the chambers 83 and 84and to be discharged through the other. While the wabbler is in actionthe seal-87 is being distorted to accommodate the movement thereof orthe bellows 96 is similarly being distorted to accommodate the movementof the plate 172. The lubrication contained within the interior 20 ofthe housing 10 and within the bore 12 of said housing is maintainedwithin said portions of the housing and prevented from entering theportion of the housing in which the fluid being pumped passes. In thismanner the fluid is prevented from being contaminated by the lubricatingmedium and the rotating parts are maintained well lubricated.

The advantages of the invention are manifest. Thoroughly lubricatedbearings and rotating parts can be employed so that friction in theoperation of the pump may be held to a minimum. The wabbler virtuallyfloats being supported by the seal, and with suitable tolerances betweenthe cooperating surfaces frictional contact therewith'can be eliminatedto further reduce the friction of the pump. Where water or similarfluids are being pumped, the fluid pumped serves as a seal between thecooperating surfaces and direct contact becomes unnecessary. The pumpcan be operated at a relatively high speed as from an electric motor andwill have a relatively great displacement for its size. By theparticular location of the seal employed, the lubrication for thebearings is separated from the chambers through which the fluid pumpedpasses and contamination of the fluid pumped is thus prevented. Thelocation of the seal in the manner specified reduces the distortion ofthe seal during operation so that the seal will have a relatively longlife.

Changes in the specific form of the invention, as herein described, maybe made within the scope of what is claimed without departing from thespirit of the invention.

Having described the invention, what is claimed as new and desired to beprotected by Letters Patent is:

1. In a wabble pump, a housing, means carried thereby and forming anannular chamber having facing frustoconical surfaces arranged indiverging relation and an outer spherical surface extendingtherebetween, said chamber having an inner annular opening, a disc likewabble plate disposed within said chamber and extending through saidopening, one side of said wabble plate lying in close proximity to oneof said conical surfaces, the other side of said wabble plate lying inclose proximity to the other of said conical surfaces and the edge oisaid wabble plate lying in close proximity to said spherical surface, adrive shaft rotatably mounted in said housing and having its axispassing through the center of said spherical surface, and at rightangles to a medial plane of said chamber equally spaced from saidfrustoconical surfaces at the intersections thereof with said sphericalsurface and containing said center, a rotor mounted on said shaft, awabble shaft rotatably mounted in said rotor and attached to said wabbleplate, the axis of said wabble shaft being at right angles to saidwabble plate and passing through the center of said spherical surface,an annular flexible seal extending between said housing and wabble shaftand having a part fixed relative to said housing and a part fixedrelative to said wabble shaft, the medial plane of said chamber passingthrough said seaL' [2. In a wabble pump, a housing, means carriedthereby and forming an annular chamber having facing frustoconicalsurfaces arranged in diverging relation and an outer spherical surfaceextending therebetween, said chamber having an inner annular opening, adisc like wabble plate disposed within said chamber and extendingthrough said opening, one side of said wabble plate lying in closeproximity-to one of said conical surfaces, the other side of said wabbleplate lying in close proximity to the other of said conical surfaces andthe edge of said wabble plate lying in close proximity to said sphericalsurface, a drive shaft rotatably mounted in said housing and having itsaxis passing throughthe center of said spherical surface, and at rightangles to a medial plane of said chamber equally spaced from saidfrusto-conical surfaces at the intersections thereof with said sphericalsurface and containing said center, a rotor mounted on said shaft, awabble shaft rotatably mounted in said rotor and attached to said wabbleplate, the axis of said wabble shaft being at right angles to saidwabble plate and passing through the center of said spherical surface, asleeve on said wabble plate and fixedly secured thereto, a second sleeveencircling said first sleeve and fixedly secured to said housing and aflexible seal secured to both of said sleeves and having parts fixedrelative to both said housing and wabble shaft, the medial plane of saidchamber passing through said seal] [3. In a wabble pump, a housing,means carried thereby and forming an annular chamber having facingfrustoconical surfaces arranged in diverging relation and an outerspherical surface extending therebetween, said chamher having an innerannular opening, said means having an inner spherical surfaceintersecting said opening and concentric with said outer sphericalsurface, a disc like wabble plate disposed within said chamber andextending through said opening, one side of said wabble plate lying inclose proximity to one. of said conical surfaces, the other side of saidwabble plate lying in close proximity to the other of said conicalsurfaces and the edge of said wabble plate lying in close proximity tosaid outer spherical surface, a drive shaft rotatably mounted in saidhousing and having its axis passing through the center of said sphericalsurfaces, and at right angles to a medial plane of said chamber equallyspaced from said frusto-conical surfaces at the intersections thereofwith said spherical surface and containing said -center, a rotor mountedon said shaft, a wabble shaft rotatably mounted in said rotor, a headmounted on said wabble shaft, said wabble plate issuing from and beingsupported by said head, said head having a spherical surface lying inclose proximity to said inner spherical surface, the axis .of saidwabble shaft being at right angles to said wabble plate and passingthrough the center of said spherical surfaces, said head having a pocketwithin the same and an annular flexible seal extending between saidhousing and said wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft, said seal beingdisposed within said pocket] [4. In a wabble pump, a housing, meanscarried ther by and forming an annular chamber having facingfrustoconical surfaces arranged in diverging relation and an outerspherical surface extending therebetween, said chamber having an innerannular opening, said means having an inner spherical surfaceintersecting said opening and concentric with said outer sphericalsurface, a disc like wabble plate disposed within said chamber andextending through said opening, one side of said wabble plate lying inclose proximity to one of said conical surfaces, the other side of saidwabble plate lying in close proximity to the other of said conicalsurfaces and the edge of said wabble plate lying in close proximity tosaid outer spheri-,

cal surface, a drive shaft rotatably mounted in said housing and havingits axis passing through the center of said spherical surfaces, and atright angles to a medial plane of said chamber equally spaced from saidfrustoconical surfaces at the intersections thereof with said sphericalsurface and containing said center, a rotor mounted on said shaft, awabble shaft rotatably mounted in said rotor, a head mounted on saidwabble shaft, said wabble plate issuing from and being supported by saidhead, said head having a spherical surface lying in close proximity tosaid inner spherical surface, the axis of said wabble shaft being atright angles to said wabble plate and passing through the center of saidspherical surface, said head having a pocket within the same and anannular flexible seal extending between said housing and wabble shaftand having a part fixed relative to said housing and a part fixedrelative to said wabble shaft, said seal being disposed within saidpocket, the medial plane of said chamber passing through said seal] [5.In a wabble pump, a housing, means carried thereby and forming anannular chamber having facing frusto-conical surfaces arranged indiverging relation and an outer spherical surface extendingtherebetween, said chamber having an inner annular opening, said meanshaving an inner spherical surface intersecting said opening andconcentric with said outer spherical surface, a

disc like wabble plate disposed within said chamber and extendingthrough said opening, one side of said wabble plate lying in closeproximity to one of said conical surfaces, the other side of said wabbleplate lying in close proximity to the other of said conical surfaces andthe edge of said wabble plate lying in close proximity to said outerspherical surface, a drive shaft rotatably mounted in said housing andhaving its axis passing through the center of said spherical surfaces,and at right angles to a medial plane of said' chamber equally spacedfrom said' frusto-conical surfaces at the intersections thereof withsaid spherical surface and containing said center, a rotor I mounted onsaid shaft, a wabble shaft rotatablymounted in said rotor, a headmounted on said wabble shaft, said wabble plate issuing from and beingsupported by said head, said head being formed with a web and a tubularmember issuing therefrom to form a pocket within said head, said tubularmember having a spherical surface lying in close proximity to said innerspherical surface, and an annular flexible seal extending between saidhousing and wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft, said seal beingdisposed within said pocket] 6. In a wabble pump, a housing, meanscarried thereby and forming an annular chamber having facingfrustoconical surfaces arranged in diverging relation and an outerspherical surface extending therebetween, said chamber having an innerannular opening, a disc like wabble plate disposed within said chamberand extending through said opening, one side of said wabble plate lyingin close proximity to one of said conical surfaces, the other side ofsaid wabble plate lying in close proximity to the other of said conicalsurfaces and the edge of said wabble plate lying in close proximity tosaid outer spherical surface, a drive shaft rotatably mounted in saidhousing and having its axis passing through the center of said sphericalsurface, and at right angles to a medial plane of said chamber equallyspaced from said frusto-conical surfaces at the intersections thereofwith said spherical surface and containing said center, a rotor mountedon said shaft, a wabble shaft rotatably mounted in said rotor andattached to said wabble plate, the axis of said wabble shaft being atright angles to said wabble plate and passing through the center of saidspherical surfaces, an annular flexible seal extending between saidhousing and wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft, the medial planeof said wabble plate passing through said seal. a

[7. In a wabble pump, a housing, means carried thereby and forming anannular chamber having facing frusto-conical surfaces arranged indiverging relation and an outer spherical surface extendingtherebetween, said chamber having an inner annular opening, a disc likewabble plate disposed within said chamber and extending through saidopening, one side of said wabble plate lying in close proximity to -oneof said conical surfaces, the other side of said wabble plate lying inclose proximity to the other of said conical surfaces and the edge ofsaid wabble plate lying in close proximity to said outer sphericalsurface, a drive shaft rotatably mounted in said housing and having itsaxis passing through the center of said spherical surface, and at rightangles to a medial plane of said chamber equally spaced from saidfrusto-conical surfaces at the intersections thereof with said sphericalsurface and containing said center, a rotor mounted on said shaft, awabble shaft rotatably mounted in said rotor and attached to said wabbleplate, the axis of said wabble shaft being at right angles to saidwabble plate and passing through the center of said spherical surface,an annular flexible seal extending between said housingand wabble shaftand having a part fixed relative to said housing and a part fixedrelative to said wabble shaft, a plane passing through the center ofsaid outer spherical surface and at right angles to the axis of saiddrive shaft passing through said seal] [8. In a wabble pump, a housing,means carried thereby and forming an annular chamber having facingfrustoconical surfaces arranged in diverging relation and an outerspherical surface extending therebetween, said chamber having an innerannular opening, a disc like wabble plate disposed within said chamberand extending through said opening, one side of said wabble plate lyingin close proximity to one of said conical surfaces, the

other side of said wabble plate lying in'close proximity to the other ofsaid conical surfaces and the edge of said wabble plate lying in closeproximity to said spherical surface, a drive shaft rotatably mounted insaid housing and having its axis passing through the center of saidspherical surface, and at right angles to a medial plane of said chamberequally spaced from said frusto-conical surfaces at the intersectionsthereof with said spherical surface and containing said center, a rotormounted on said shaft, a wabble shaft rotatably mounted in said rotorand attached to said wabble plate, the axis of said wabble shaft beingat right angles to said wabble plate and passing through the center ofsaid spherical surface, an annular flexible seal extending between saidhousing and wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft, said flexibleseal being disposed substantially at said center] [9. In a wabble pump,a housing, means carried thereby and forming an annular chamber havingfacing frusto-conical surfaces arranged in diverging relation and anouter spherical surface extending therebetween, said chamber having aninner annular opening, a disc like wabble plate disposed within saidchamber and extending through said opening, one side of said wabbleplate lying in close proximity to one of said conical surfaces, andspaced therefrom, the other side of said wabble plate lying in closeproximity to the other of said conical surfaces and spaced therefrom andthe edge of said wabble plate lying in close proximity to said sphericalsurface and spaced therefrom, a drive shaft rotatably mounted in saidhousing and having at its axis passing through the center of saidspherical surface, and at right angles to a medial plane of said chamberequally spaced from said frusto-conical surfaces at the intersectionsthereof with said spherical surface and containing said center, a rotormounted on said shaft, a wabble shaft rotatably mounted in saidv rotorand attached to said wabble plate, the axis of said wabble shaft beingat right angles to said wabble plate and passing through the center ofsaid spherical surface, an annular flexible seal extending between saidhousing and wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft said flexibleseal being disposed substantially at said center] [10. In a wabble pump,a housing, means'carried thereby and forming an annular chamber havingfacing frusto-conical surfaces arranged in diverging relation and anouter spherical surface extending therebetween. said chamber having aninner annular opening, said means having an inner spherical surfaceintersecting-said opening and concentric with'said outer sphericalsurface, a disc like wabble plate disposed within said chamber andextending through said opening, one side of said wabble plate lying inclose proximity to one of said conical surfaces, the other side of saidwabble plate lying in close proximity to the other of said conicalsurfaces and the edge of said wabble plate lying in close proximity tosaid outer spherical surface, a drive shaft rotatably mounted in saidhousing and having its axis passing through the center of said sphericalsurfaces, and at right angles to a medial plane of said chamber equallyspaced from said frusto-conical surfaces at the intersections thereofwith said spherical surface and containing said center, a rotor mountedon said shaft, a wabble shaft rotatably mounted in said rotor, a headmounted on said wabble shaft, said wabble plate issuing from and beingsupported by said head, said head having a spherical surface lying inclose proximity to said inner spherical surfaces,

9 posed within said pocket and being insertable therein through the openend thereof] [11. In a wabble pump, a housing, means carried thereby andforming an annular chamber having facing frusto-conical surfacesarranged in diverging relation and an outer spherical surface extendingtherebetween,

said chamber having an inner annular opening, said means having an innerspherical surface intersecting said opening and concentric with saidouter spherical surface, a disc like wabble plate disposed within saidchamber and extending through said opening, one side of said wabbleplate lying in close proximity to one of said conical surfaces, theother side of said wabble plate lying in close proximity to the other ofsaid conical surfaces and the edge of said wabble plate lying in closeproximity to said outer spherical surface, a drive shaft rotatablymounted in said housing and having its axis passing through the centerof said spherical surfaces, and at right angles to a medial plane ofsaid chamber equally spaced from said frusto-conical surfaces at theintersections thereof with said spherical surface and containing saidcenter, a rotor mounted on said shaft, a wabble shatt rotatably mountedin said rotor, a head mounted on said wabble shaft, said wabble plateissuing from and being supported by said head, said head having aspherical surface lying in close proximity to said inner sphericalsurface, the axis of said wabble shaft being at right angles to saidwabble plate and passing through the center of said spherical surfaces,said head having a pocket within the same open axially on the side ofsaid head facing said rotor, a sleeve carried by said housing and fixedrelative thereto, said sleeve entering said pocketthrough the open endthereof, an annular flexible seal encircling said wabble shaft andreceived within said pocket, a sleeve encircling said wabble shaft andfixed relative thereto said seal at its outer periphery being secured tosaid first named sleeve and at its inner periphery to said secondnamedsleeve] [12. In a wabble pump, a housing, means carried thereby andforming an annular chamber having facing frustoconical surfaces arrangedin diverging relation and an outer spherical surface extendingtherebetween, said chamber having an inner annular opening, said meanshaving an inner spherical surface intersecting said opening andconcentric with said outer spherical surface, a disc like wabble platedisposed within said chamber and extending through said opening, oneside of said wabble plate lying in close proximity to one of saidconical surfaces, the other side of said wabble plate lying in closeproximity to the other of said conical surfaces and the edge of saidwabble plate lying in close proximity to said outer spherical surface, adrive shaft rotatably mounted in said housing and having its axispassing through the center of said spherical surfaces, and at rightangles to a medial plane of said chamber equally spaced from saidfrusto-conical surfaces at the intersections thereof with said sphericalsurface and containing said center, a rotor mounted on said shaft, awabble shaft rotatably mounted in said rotor, a head mounted on saidwabble shaft, said wabble plate issuing from and being supported by saidhead, said head having a spherical surface lying in close proximity tosaid inner spherical surface, the axis of said wabble shaft being atright angles to said wabble plate and passing through the center of saidspherical surfaces, said head having a pocket within the same openaxially on the side of said head facing said rotor, annular meanscarried by said housing and entering said pocket through the open endthereof, an annular flexible seal encircling said wabble shaft andreceived within said pocket, said seal at its outer periphery beingfixed relative to said annular means and at its inner periphery beingfixed relative to said wabble shaft] 13. In a wabble pump, a housingmeans carried thereby and forming an annular chamber having facingfrustoconical surfaces arranged in diverging relation and an outerspherical surface extending therebetween, said chamber having an innerannular opening, said means having. an inner spherical surfaceintersecting said opening and concentric with said outer sphericalsurface, a disc like wabble plate disposed within said,.chamber andextending through said opening, one side of said wabble plate lying inclose proximity to one of said conical surfaces, the other side of saidwabble plate lying in close proximity to the other of said conicalsurfaces and the edge of said wabble plate lying in close proximity tosaid outer spherical surface, a drive shaft rotatably mounted in saidhousing and having its axis passing through the center of said sphericalsurfaces, and at right angles to a medial plane of said chamber equallyspaced from said frusto-conical surfaces at the intersections thereofwith said spherical surface and containing said center, a rotor mountedon said shaft, a wabble shaft rotatably mounted in said rotor, a headmounted on said wabble shaft, said wabble plate issing from and beingsupported by said head, said head having a spherical surface lying inclose proximit'y to said inner spherical surface, the axis of saidwabble shaft being at right angles to said wabble plate and passingthrough the center of said spherical surfaces, said head having a pocketwithin the same open axially on the side of said head facing said rotor,a sleeve carried by said housing and fixed relative thereto, said sleeveentering said pocket through the open end thereof, an annular flexibleseal encircling said wabble shaft and received within said pocket, asleeve encircling said wabble shaft and fixed relative thereto, saidseal at its outer periphery being secured to said first named sleeve andat its inner periphery to said second named sleeve, the medial plane ofsaid chamber passing through said seal.

14. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, 0 wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft,means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft and an outer spherical surface extending therebetween withits center disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble plate carried by said'shaftand extending through said opening and into said chamber, said wabbleplate having spaced surfaces formed by lines conforming to and disposedin close proximity to elements of said first named facing surfaces androtated about the axis of said wabble shaft, a sleeve on said wabbleplate and fixedly secured thereto, a second sleeve encircling said firstsleeve and fixedly secured to said housing, and a flexible seal securedto both of said sleeves and having parts fixed relative to both saidhousing and wabble shaft, said seal being disposed substantially at saidcenter.

15. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft, an outer spherical surface extending therebetween with itscenter disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble head mounted on said wabbleshaft, a wabble plate issuing from and being supported by said head, andextending through said opening and into said chamber, said wabble platehaving spaced surfaces formed by lines conforming to and disposed inclose proximity to elements of said first named facing surface androtated about the axis of said wabble shaft, said head having a pocketwithin the same, and an annular flexible seal extending between saidhousing and wabble shaft, and having a part fixed relative to saidhousing and a part fixed relative to-said wabble shaft, said seal beingdisposed within said pocket.

16. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing. a rotor mounted on said shaft, 11 wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft, an outer spherical surface extending therebetween with itscenter disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble head mounted on said wabbleshaft, a wabble plate issuing from and being supported by said head andextending through said opening and into said chamber, said wabble platehaving spaced surfaces formed by lines conforming to and disposed inclose proximity to elements of said first named facing surfaces androtated about the axis of said wabble shaft, said head having a pocketwithin the same, and an annular flexible seal extending between saidhousing and wabble shaft and having a part fixed relative to saidhousing and a part fixed relative to said wabble shaft, said seal beingdisposed within said pocket, said seal being disposed substantially atsaid center. o

I 7. In a wabble pump, a housing, a drive shaft rotatably mounted insaid housing, a rotor mounted on said shaft, a wabble shaft mounted insaid rotor for relative rotation therebetween and having its axisforming an angle with and intersecting the axis of said drive shaft,means carried by said housing and providing an annular chamber havingspaced surfaces facing each other and formed by lines rotated about theaxis of the drive shaft and an outer spherical surface extendingtherebetween with its center disposed at the intersection-between saidaxes, said chamber having an inner annular opening, a wabble headmounted on said wabble shaft and secured thereto, a wabble plate issuingoutwardly from said head and extending through said opening and intosaid chamber, said wabble plate having spaced surfaces formed by linesconforming to and disposed in close proximity to elements of said firstnamed facing surfaces and rotated about the axis of said wabble shaft,said head having a pocket, a sleeve fixed relative to saidhousing, andan annular flexible seal disposed in said pocket and extending betweensaid housing and wabble shaft and having a part fixed relative to saidsleeve and a part fixed relative to said wabble shaft.

18. Ina wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for reldtive rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing. each other and formed by lines rotated about the axis of thedrive shaft, an outer spherical surface extending therebetween with itscenter disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble head including a hub mountedon said wabble shaft and secured thereto, a web issuing outwardly fromsaid hub, a tubular member issuing outwardly from said web and formingwith said web a pocket in said head, a wabble plate issuing from said'tubular member and extending through said opening and into said chamber,said wabble plate having spaced surfaces formed by lines conforming toand in close proximity to elements of said first named facing surfacesand rotated about the axis of said wabble shaft, a sleeve fixed relativeto said housing, and extending into said pocket, and an annular flexibleseal disposed in said pocket, extending between said sleeve and wabbleshaft and having a part fixed relative to said sleeve and a part fixedrelative to said wabble shaft.

I 9. In a wabble pump, a housing, a drive shaft rotatably mounted insaid housing, a rotor mounted on said shaft, a wabble shaft mounted insaid rotor for relative rotation therebetween and having its axisforming an angle with and intersecting the axis of said drive shaft,means carried by said housing and providing an annular chamber havingspaced surfaces facing each other and formed by lines rotated about theaxis of the drive shaft and an outer spherical surface extendingtherebetween with its center disposed at the intersection between saidaxes, said chamber having an inner annillar opening, a wabble platecarried by said wabble shaft and extending through said opening and intosaid chamber, said wabble plate having spaced surfaces formed by linesconforming to and disposed in close proximity to elements of said firstnamed facing surfaces and rotated about the axis of said wabble shaft,and an annular flexible seal extending between said housing and wabbleshaft and having a 15' part fixed relative to said housing and a partfixed relative to said wabble shaft, a plane passing through said centerand'disposed at right angles to the. axis of said drive shaft passingsubstantially through said seal.

20. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft and an outer spherical surface extending therebetween withits Center disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble plate carried by said wabbleshaft and extending through said openingv and into said chamber, saidwabble plate having spaced surfaces formed by lines conforming to anddisposed in close proximity to elements of said first named facingsurfaces and rotated about the axis of said wabble shaft, and an annularflexible seal extending between said housing and wabble shaft and havinga part fixed relative to said housing and a part fixed relative to saidwabble shaft, said flexible seal being disposed substantially at saidcenter.

21. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for relative rotation therebetween and having its-axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft and an outer spherical surface extending therebetween withits center disposed at the intersection between said axes, said chamberhaving an inner'annular opening, a wabble plate carried by said wabbleshaft and extending through said opening and into said chamber, saidwabble plate having spaced surfaces formed by lines conforming to anddisposed in close proximity to elements of said first named facingsurfaces and rotated about the axis of said wabble shaft, the surfacesof said wabble plate being spaced from the surfaces of the housingforming said chamber, and an annular flexible seal extending betweensaid housing and wabble shaft and having a part 0 fixed relative to saidhousing and a part fixed relative to said wabble shaft, said flexibleseal ,being disposed substantially at said center.

22. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said 35 shaft, a wabble shaft mounted insaid rotor for relative rotation therebetween and having its axisforming an angle with and intersecting the axis of said drive'shaft,means carried by said housing and providing an annular chamber havingspaced surfaces facing each other and formed by lines rotated about theaxis of the drive shaft and an outer spherical surface extendingtherebetween with its center disposed at the intersection between saidaxes, said chamber having an inner annular opening, a H wabble headmounted on said wabble shaft and secured thereto, a wabble plate issuingoutwardly from said head and extending through said opening and intosaid chamber, said wabble plate having spaced surfaces formed by linesconforming to and disposed in close proximity to elements of said firstnamed facing surfaces and rotated about the axis of said wabble shaft,said head having a pocket open axially on one side of said head, and anannular flexible seal extending between said housing and said wabbleshaft and having a part fixed relative to said housing and a part fixedrelative to said wabble shaft, said seal being disposed within saidpocket and being insertable therein through the open end thereof.

23. In a wabble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with and intersecting the axis of said drive shaft, means carriedby said housing and providing an annular chamber having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft and an outer spherical surface extending therebetween withits center disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble head mounted on said wabbleshaft and secured thereto, a wabble plate issuing outwardly from saidhead and extending through said opening and into said chamber, saidwabble plate having spaced surfaces formed by lines conforming to anddisposed in close proximity to elements of said first named facingsurfaces and rotated about the axis of said wabble shaft, said headhaving a pocket open axially on the side of said head facing said rotor,a sleeve carried by said housing and fixed relative thereto, said sleeveentering said pocket through the open end thereof, an annular flexibleseal encircling said wabble shaft and received within said pocket, asleeve encircling said wabble shaft and fixed relative thereto, saidseal at its outer periphery being secured to said first named sleeve andat its inner periphery to said second named sleeve.

24. In a wobble pump, a housing, a drive shaft rotatably mounted in saidhousing, a rotor mounted on said shaft, a wabble shaft mounted in saidrotor for relative rotation therebetween and having its axis forming anangle with an intersecting the axis of said drive shaft, means carriedby said housing and providing an annular cham her having spaced surfacesfacing each other and formed by lines rotated about the axis of thedrive shaft and an outer spherical surface extending therebetween withits center disposed at the intersection between said axes, said chamberhaving an inner annular opening, a wabble head mounted on said wabbleshaft and secured thereto, a wabble plate issuing outwardly from saidhead and extending through said opening and into said chamber, saidwabble plate having spaced surfaces formed by lines con forming to anddisposed in close proximity to elements of said first named facingsurfaces and rotated about the axis of said wabble shaft, said headhaving a pocket open axially on one side of said head, annular meanscarried by said housing and entering said pocket through the open endthereof, an annular flexible seal encircling said wobble shaft andreceived within said pocket, said sea! at its outer periphery beingfixed relative to said annular means and at its inner periphery beingfixed relative to said wobble shaft.

References Cited in the file of this patent or the original patentUNITED STATES PATENTS 1,434,741 Goodner Nov. 7, 1922 2,065,834 SwennesDec. 29, 1936 2,107,090 Swennes Feb. 1, 1938 2,253,306 Pmbst. Aug. 19,1941 FOREIGN PATENTS 37,077 Sweden June 25, 1914 105,461 Sweden July 9,1942

